Tweaking

Tweaking is a glitch that first appeared in the fourth generation of Pokémon. It is caused by pressing the left and right buttons continuously whilst holding the up button and riding on a bicycle in fourth gear. It is most easily done in Jubilife City. This glitch will throw up invisible walls or cause a section/route to become black, only seeing the shadows of trainers, items etc. It also allows you to go through signs.

According to some, tweaking may allow players to catch Arceus, Shaymin, and Darkrai, however, this is unconfirmed.

External Links

Pokemon Diamond/Pearl Tweaking Glitch

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